Deus Ex Story.

The Deus Ex storyline is one of the best I've seen along with Final Fantasy VII. I'm not going to tell you all of the story because it develops and grows throughout the game and if I told you it would ruin it.

Basically your a special mechanically augmented agent for a security organisation called UNATCO. You are one of two along with your brother. You have been dispatched to sort out terrorist activity in Liberty Island and then the story goes from there.